Siphonic roof drain



FIG. 1 is a perspective view of a siphonic roof drain embodying my newdesign;

FIG. 2 is a front elevational view thereof.

FIG. 3 is a rear elevational view thereof.

FIG. 4 is a first side elevational view thereof.

FIG. 5 is a second side elevational view thereof.

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken line shown is for illustrative purposes only and forms nopart of the claimed design.

The ornamental design for a siphonic roof drain, as shown and described.